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Leaching behavior of As, Pb, Ni, Fe, and Mn from subsurface marine and nonmarine depositional environment in central Kanto Plain, Japan

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doi: 10.3390/geosciences9100435
Authors:Hossain, Sushmita; Ishiyama, Takashi; Hachinohe, Shoichi; Oguchi, Chiaki T.
Author Affiliations:Primary:
Saitama University, Department of Civil and Environmental Engineering, Saitama, Japan
Center for Environmental Science in Saitama, Environmental Geotechnology Group, Saitama, Japan
Volume Title:Geosciences (Basel)
Source:Geosciences (Basel), 9(10). Publisher: Multidisciplinary Digital Publishing Institute (MDPI), Basel, Switzerland. ISSN: 2076-3263
Publication Date:2019
Note:In English. Part of a special issue entitled Marine sediments and marine environments, edited by Lopez-Gonzalez, N., et al.. 60 refs.; illus., incl. 7 tables, strat. cols., geol. sketch map
Summary:The leaching behavior of arsenic (As), lead (Pb), nickel (Ni), iron (Fe), and manganese (Mn) was investigated from subsurface core sediment of marine and nonmarine depositional environments in central Kanto Plain, Japan. A four-step sequential extraction technique was adopted to determine the chemical speciation, potential mobility, and bioavailability of metals under natural conditions in variable depositional environments. In addition, a correlation of these properties with pore water and total metal content was carried out. The concentration of As in pore water was found to be 2-3 times higher than the permissible limit (10 µg/L) for drinking water and leachate in fluvial, transitional, and marine environments. The trend of potential mobile fractions of As, Pb, and Ni showed Fe-Mn oxide bound > carbonate bound > ion exchangeable bound > water soluble in the fluvial environment. However, in the marine environment, it showed Fe-Mn oxide bound > water soluble > carbonate bound > ion exchangeable bound for As. The leaching of As in this fluvial environment is due to the organic matter-mediated, reductive dissolution of Fe-Mn oxide bound, where Mn is the scavenger. The amount of total content of As and sulfur (S) in transitional sediment reflects an elevated level of leachate in pore water, which is controlled by S reduction. However, the leaching of As in marine sediment is controlled by pH and organic matter content.
Subjects:Agriculture; Aquifer vulnerability; Aquifers; Arsenic; Bioavailability; Boreholes; Clastic sediments; Clay; Conservation; Deposition; Depositional environment; Drinking water; Electrical conductivity; Fluvial environment; Fluvial sedimentation; Geochemical cycle; Ground water; Hazardous waste; Human activity; Igneous rocks; Incised valleys; Ion exchange; Iron; Leachate; Leaching; Lead; Manganese; Marine sediments; Metals; Mobility; Nickel; Peat; PH; Pollution; Pore water; Public health; Pyroclastics; Risk assessment; Sand; Sedimentation; Sediments; Shallow aquifers; Soils; Toxicity; Trace metals; Tuff; Volcanic rocks; Water pollution; Water resources; Asia; Far East; Honshu; Japan; Kanto Plain; Saitama Japan
Coordinates:N353500 N361500 E1395500 E1384200
Record ID:867506-26
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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